<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图 -->
        <el-card>
            <el-row>
                <el-col>
                    <!-- 添加角色按钮区域 -->
                    <el-button type="primary">添加角色</el-button>
                </el-col>
            </el-row>

            <!-- 角色列表区域 -->
            <el-table :data="rolelist" border stripe>
                <!-- 展开列 -->
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
                            <!-- 渲染一级权限 -->
                            <el-col :span="5">
                                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 渲染二级和三级权限 -->
                            <el-col :span="19">
                                <!-- 通过 for循环 嵌套渲染二级权限 -->
                                <el-row :class="[i2 === 0 ? '' :'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                                    <el-col :span="6" >
                                        <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                                         <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <el-tag type="warning" v-for="(item3, i3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">{{item3.authName}}</el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                        <!-- <pre>
                            {{scope.row}}
                        </pre> -->
                    </template>
                </el-table-column>
                <!-- 索引列 -->
                <el-table-column type="index"></el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
                <el-table-column label="操作" width="330px">
                    <template slot-scope="scope">
                       <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
                       <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
                       <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)" >分配权限</el-button>
                    </template>
                </el-table-column>
            </el-table>

        </el-card>
        <!-- 分配权限的对话框 -->
        <el-dialog title="分配权限" :visible.sync="setRightDiaVisible" width="50%" @close="setRightDialogClosed">
            <!-- 树形控件 -->
            <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDiaVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>
export default {
    data() {
        return {
            // 所有角色列表数据
            rolelist: [],
            // 控制分配权限对话框显示与隐藏
            setRightDiaVisible: false,
            // 所有权限的数据
            rightslist:[],
            // 树形控件的属性绑定独享
            treeProps: {
                label: 'authName',
                children: 'children'
            },
            // 默认选中的节点 id值数组
            defKeys: [],
            // 当前即将分配权限的角色id
            roleId: '',
        }
    },
    created() {
        this.getRolesList()
    },
    methods: {
       async getRolesList() {
           const {data: res} = await this.$http.get('roles')
           if (res.meta.status !== 200) {
               return this.$message.error('获取角色列表失败')
           }
           this.rolelist = res.data
           console.log(this.rolelist);
        },
        // 根据id删除对应的权限
       async removeRightById(role, rightId) {
            // 弹框提示用户是否删除
           const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
                }).catch(err => err)
                if (confirmResult !== 'confirm') {
                    return this.$message.info('取消了删除')
                }
                // console.log('确认了删除');
              const {data: res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
              if (res.meta.status !== 200) {
                  return this.$message.error('删除权限失败')
              }
            //   this.getRolesList()
            role.children = res.data
        },
        // 展示分配权限对话框
       async showSetRightDialog(role) {
           this.roleId = role.id
            // 获取所有权限的数据
           const  {data: res} = await this.$http.get('rights/tree')
           if (res.meta.status !== 200) {
               return this.$message.error('获取权限数据失败')
           }
        //    把获取到的全线数据保存到data中
           this.rightslist = res.data
           console.log(this.rightslist);
        //    递归获取三级节点的ID
        this.getLeafKeys(role, this.defKeys)
            this.setRightDiaVisible = true
        },
        // 通过递归的形式，获取角色所有三级权限的ID， 并保存到defKeys 数组中
        getLeafKeys(node, arr) {
            // 如果当前ndoe节点不包含 children属性， 则是三级节点
            if (!node.children) {
                return arr.push(node.id)
            }
            node.children.forEach(item => this.getLeafKeys(item, arr))
        },
        // 监听分配权限对话框的关闭事件
        setRightDialogClosed() {
            this.defKeys = []
        },
        // 点击为角色分配权限
       async allotRights() {
            const keys = [
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()
            ]
            // console.log(keys);
        const idStr = keys.join(',')
        console.log(idStr);
        const {data: res} = await this.$http.post(`roles/${this.roleId}/rights`, {rids: idStr})
        if (res.meta.status !== 200) {
            return this.$message.error('分配角色失败')
        }
        this.$message.success('分配权限成功')
        this.getRolesList()
        this.setRightDiaVisible = false
        }
    }
}
</script>

<style lang="less" scoped>
    
</style>